Debit money on a requested date!!

I have a funeral policy with Sanlam and since I had the policy I have been complaining about the same issue. I've asked Sanlam to do their debit on the 25th of each month and if the 25th falls on a weekend then they should debit the money the following week. I've been promised this will never happen again but it is still happening. I asked for this as I won't always have money on my back until I get paid..and once the debits don't go through my back charges me. 24th of Jan Sanlam debited the money again and today it was the same thing. I called the service desk number and Walter Maringa took my call and he was no help at all. I explained my situation and all he could tell me MAYBE THE SYSTEM is automated to do debits on the 24th if the 25th is on weekend. And when I asked if my money could be reversed he told me NO WE CAN'T reverse the money because of lockdown. I mean really....using lockdown as an excuse if you don't want to assist the client. Could someone from Sanlam if I will always have this issue or it can be resolved? I can't keep on complaining about the same issue over and over.